Why serial photoelectric isolation?
As the name suggests, is the main role of isolation! The purpose of the interference source and interference of isolated from the circuit, the control...
As the name suggests, is the main role of isolation! The purpose of the interference source and interference of isolated from the circuit, the control device and the scene only to maintain signal contact, but not direct electrical contact. Isolation is the essence of the interference channel introduction is cut off, so as to achieve the purpose of isolating field interference.
Photoelectric isolator (optical coupler, English abbreviated as OC) also known as optical coupler, referred to as coupler. Optical coupler to transmit light signals for the media, it has good effect of segregation on the input, output signal. So, it is widely used in a variety of circuit. This completes the electric - light - electricity conversion, which plays the role of isolation, input, output. Due to the mutual isolation between input and output optical coupler, with one-way signal transmission characteristics, and therefore has good electrical insulation and anti-jamming ability. The main advantages of optical coupler is: unidirectional signal transmission, the input and output fully realize the electrical isolation, the output signal without effect on the input end, strong anti-interference ability, stable work. The main advantages of optical coupler is: unidirectional signal transmission, the input and output fully realize the electrical isolation, the output signal without effect on the input end, strong anti-interference ability, stable work.
At present, the optoelectronic isolator in serial communication also plays a very important role, photoelectric isolator has been widely used in serial communication.
In serial communication, we also known as he is serial isolator. In serial communication, we also known as he is serial isolator. It adopts photoelectric isolation technology advanced, can greatly protect the RS232 interface equipment, to avoid accidental damage and damage the wire loop voltage, surge, lightning strike, electrostatic, hot plug and so on RS232 equipment caused by bad environment.
The use of serial photoelectric isolator, security contractors have adopted is particularly prominent, why? Because in the security monitoring projects often encounter a ground signal interference, electrical interference, interference of space electric field, as well as other harmonic disturbance will affect the progress and quality of the project. For example, in the control room is RS232 mode of communication between a RS232 PC and control room of PlC, its PLC terminal has a strong signal to interference, resulting in PLC and PC communication fault, if at this time between PC and PLC with the photoelectric isolator can well solve the communication fault.
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